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Weistec Engineering has released their M157 tune for Mercedes 63 AMG vehicles. The tune adds an incredible 149 wheel horsepower and 193 wheel torque. These gains come on 91 octane and to this point nobody has shown more horsepower on 91 octane pump gas tune only on the M157 platform. In addition to the horsepower gains the top speed limiter is removed, throttle maps are changed for better response, and boost, fuel, and spark are all adjusted. Check out the product page to order or for more info: http://weistec.com/m157s1.html

This tune is available for standard M157 vehicles or for those with the optional Performance Package. Gains with the Performance Package are less at 106 wheel horsepower due to the tune being more aggressive from the factory.

Compare it to the performace package and it is a hp per dollar bargain.

For sure but all bargains come with a trade off...in this case its the warranty. But I do agree, strictly on paper....the tune is undeniably the way to go with this new motor. I'm going to the dealer tomorrow to test drive the new ML63. Might be a shakeup in my car lineup as this dealer also has a C63BS with track pkg coming soon

For sure but all bargains come with a trade off...in this case its the warranty. But I do agree, strictly on paper....the tune is undeniably the way to go with this new motor. I'm going to the dealer tomorrow to test drive the new ML63. Might be a shakeup in my car lineup as this dealer also has a C63BS with track pkg coming soon

With what this motor does with just a tune I think it's difficult to not want to pick up that SUV. Would love to trade my Cayenne in for one...

With what this motor does with just a tune I think it's difficult to not want to pick up that SUV. Would love to trade my Cayenne in for one...

Yup I'm thinking the same - plus the AWD drive will make it unbeatable off the line. I can't wait to see the salesman's face when I put it in dyno mode for the test drive LOL. Too bad they are not offering this M157 motor in anything that even comes close to a sports car...

Yup I'm thinking the same - plus the AWD drive will make it unbeatable off the line. I can't wait to see the salesman's face when I put it in dyno mode for the test drive LOL. Too bad they are not offering this M157 motor in anything that even comes close to a sports car...

For sure but all bargains come with a trade off...in this case its the warranty. But I do agree, strictly on paper....the tune is undeniably the way to go with this new motor. I'm going to the dealer tomorrow to test drive the new ML63. Might be a shakeup in my car lineup as this dealer also has a C63BS with track pkg coming soon

Read somewhere that they're going to make a M157 G63 too. That thing will be bananas.